Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoi su den snippets" » "khoi tu den snippets", "khoi su yen snippets", "khoi se den snippets", "khoa su den snippets", "hoi su den snippets", "thoi su den snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("khoi su den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khoi su den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoi su den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoi su den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.